CODEWITHSUNDEEP
androidjsonweb-services
Evgenij Reznik
Evgenij Reznik

Reputation: 18594

Retrieving and Parsing JSON

What's the easiest way to retrieve JSON from a web-service and to parse it? Without using any additional plug-ins?

Upvotes: 0

Views: 153

Answers (4)

Ankit Saxena
Ankit Saxena

Reputation: 2319

This is the best way to retreive JSON data and parsing it, i have used it in my project and it works totally well. Check out this Tutorial (source code also available). If you are using JSON, you will definitely need Google gson library to convert Java Objects into their JSON representation. You can download it from here.

Upvotes: 2

JonWillis
JonWillis

Reputation: 3147

The code below should give you a starting point, just use it in an activity/service class. Its gets data from a URL (webservice), and converts it into a JSON object you can use.

StringBuilder stringBuilder =  new  StringBuilder();
HttpClient client =  new  DefaultHttpClient();
HttpGet httpGet = new  HttpGet(***Put your web service URL here ***)
try
{
    HttpResponse response = client.execute(httpGet);
    StatusLine statusLine = response.getStatusLine();
    int  statusCode = statusLine.getStatusCode();
    if (statusCode == 200)
    {
        HttpEntity entity = response.getEntity();
        InputStream content = entity.getContent();
        BufferedReader reader = new  BufferedReader(
        new  InputStreamReader(content));
        String line;
        while ((line = reader.readLine()) != null)
        {
           stringBuilder.append(line);
        }
     }
} 
catch (ClientProtocolException e)
{
    e.printStackTrace();
}
catch (IOException e)
{
     e.printStackTrace();
}

//Turn string JSON into object you can process
JSONArray jsonArray = new JSONArray(stringBuilder.toString());
for  (int  i = 0; i < jsonArray.length(); i++)
{
     //Get Each element
     JSONObject jsonObject = jsonArray.getJSONObject(i); 
     //Do stuff
}

Upvotes: 0

Pierre
Pierre

Reputation: 6172

You should have a look here: http://code.google.com/p/android-query/wiki/AsyncAPI

Everything is explained, with the code samples you need.

Upvotes: 0

waqaslam
waqaslam

Reputation: 68167

If you want the standard procedure then you need to use JSONObject and JSONArray to parse responses. However, it is fuzzy and cumbersome when your response string contains a complex structure. In order to deal such complex responses its better to off the parsing to Gson, Jackson or any other library.

Upvotes: 0

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